Re: [rules-users] NullPointerException when load file rules

Do you have the mvel2 bundle in your class path? Did you add the file that I mention inside the META-INF dir inside your app? Cheers. 2012/1/10 elMateo <soyelmateo(a)gmail.com&gt;: > Now, this is the trace: (it's different to the other) > > org.drools.RuntimeDroolsException: Unable to load dialect ':mvel:null' > [stderr] at > org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:283) > [stderr] at > org.drools.compiler.PackageBuilderConfiguration.buildDialectConfigurationMap(PackageBuilderConfiguration.java:268) > [stderr] at > org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:181) > [stderr] at > org.drools.compiler.PackageBuilderConfiguration.<init>(PackageBuilderConfiguration.java:159) > [stderr] at > org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:210) > [stderr] at > org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:143) > [stderr] at > org.drools.builder.impl.KnowledgeBuilderFactoryServiceImpl.newKnowledgeBuilder(KnowledgeBuilderFactoryServiceImpl.java:34) > [stderr] at > org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(KnowledgeBuilderFactory.java:47) > [stderr] at drools.ejemplos.DroolsTest.readKnowledgeBase(DroolsTest.java:94) > [stderr] at drools.ejemplos.DroolsTest.execute(DroolsTest.java:68) > [stderr] at drools.ejemplos.DroolsTest.<init>(DroolsTest.java:60) > [stderr] at drools.ejemplos.Activator.start(Activator.java:14) > [stderr] at > org.knopflerfish.framework.BundleImpl.start0(BundleImpl.java:356) > [stderr] at > org.knopflerfish.framework.BundleThread.run(BundleThread.java:107) > [stderr] Caused by: java.lang.NullPointerException > [stderr] at > org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:278) > [stderr] ... 13 more > > On Tue, Jan 10, 2012 at 6:46 PM, Mauricio Salatino <salaboy(a)gmail.com&gt; > wrote: >> >> If it works we can prove that most of the OSGI containers works in the >> same way :) >> >> 2012/1/10 elMateo <soyelmateo(a)gmail.com&gt;: >> > Hi Mauricio, >> > >> > I'm going to test this. >> > >> > Thank you so much!! >> > >> > On Tue, Jan 10, 2012 at 6:35 PM, Mauricio Salatino <salaboy(a)gmail.com > >> > wrote: >> >> >> >> Oh.. I see what is happening here.. the Default dialects and session >> >> configurations are not being loaded by your OSGI environment :) >> >> It took me a while to find that out so I hope this comment helps you >> >> to save some valuable time. >> >> Solution: you need to add inside your project that is loading the >> >> rules the following file: >> >> META-INF/drools.packagebuilder.conf >> >> >> >> That contains the following content: >> >> drools.dialect.default = java >> >> drools.dialect.java = >> >> org.drools.rule.builder.dialect.java.JavaDialectConfiguration >> >> drools.dialect.java.compiler = ECLIPSE >> >> >> >> drools.dialect.mvel = >> >> org.drools.rule.builder.dialect.mvel.MVELDialectConfiguration >> >> drools.dialect.mvel.strict = true >> >> drools.dialect.mvel.langLevel = 4 >> >> >> >> drools.accumulate.function.average = >> >> org.drools.base.accumulators.AverageAccumulateFunction >> >> drools.accumulate.function.max = >> >> org.drools.base.accumulators.MaxAccumulateFunction >> >> drools.accumulate.function.min = >> >> org.drools.base.accumulators.MinAccumulateFunction >> >> drools.accumulate.function.count = >> >> org.drools.base.accumulators.CountAccumulateFunction >> >> drools.accumulate.function.sum = >> >> org.drools.base.accumulators.SumAccumulateFunction >> >> drools.accumulate.function.collectList = >> >> org.drools.base.accumulators.CollectListAccumulateFunction >> >> drools.accumulate.function.collectSet = >> >> org.drools.base.accumulators.CollectSetAccumulateFunction >> >> >> >> drools.evaluator.coincides = >> >> org.drools.base.evaluators.CoincidesEvaluatorDefinition >> >> drools.evaluator.before = >> >> org.drools.base.evaluators.BeforeEvaluatorDefinition >> >> drools.evaluator.after = >> >> org.drools.base.evaluators.AfterEvaluatorDefinition >> >> drools.evaluator.meets = >> >> org.drools.base.evaluators.MeetsEvaluatorDefinition >> >> drools.evaluator.metby = >> >> org.drools.base.evaluators.MetByEvaluatorDefinition >> >> drools.evaluator.overlaps = >> >> org.drools.base.evaluators.OverlapsEvaluatorDefinition >> >> drools.evaluator.overlappedby = >> >> org.drools.base.evaluators.OverlappedByEvaluatorDefinition >> >> drools.evaluator.during = >> >> org.drools.base.evaluators.DuringEvaluatorDefinition >> >> drools.evaluator.includes = >> >> org.drools.base.evaluators.IncludesEvaluatorDefinition >> >> drools.evaluator.starts = >> >> org.drools.base.evaluators.StartsEvaluatorDefinition >> >> drools.evaluator.startedby = >> >> org.drools.base.evaluators.StartedByEvaluatorDefinition >> >> drools.evaluator.finishes = >> >> org.drools.base.evaluators.FinishesEvaluatorDefinition >> >> drools.evaluator.finishedby = >> >> org.drools.base.evaluators.FinishedByEvaluatorDefinition >> >> drools.evaluator.equality = >> >> org.drools.base.evaluators.EqualityEvaluatorsDefinition >> >> drools.evaluator.comparable = >> >> org.drools.base.evaluators.ComparableEvaluatorsDefinition >> >> drools.evaluator.set = >> >> org.drools.base.evaluators.SetEvaluatorsDefinition >> >> drools.evaluator.matches = >> >> org.drools.base.evaluators.MatchesEvaluatorsDefinition >> >> drools.evaluator.soundslike = >> >> org.drools.base.evaluators.SoundslikeEvaluatorsDefinition >> >> >> >> That is provided by drools-compiler.jar or drools-core.jar (I don't >> >> have the code here) but it's not being picked up by the OSGI >> >> container. >> >> >> >> Cheers >> >> >> >> >> >> 2012/1/10 elMateo <soyelmateo(a)gmail.com&gt;: >> >> > I'm using Drools 5.4.0 Beta 1 and my DRL is the Hello World of Drools >> >> > :) >> >> > (all my application is the Hello World of Drools, because I'm trying >> >> > to >> >> > do a >> >> > OSGi bundle with this application). >> >> > >> >> > In my OSGi framework is running drools.core, drools.compiler and >> >> > knowledge-api, and others bundles. >> >> > >> >> > Thanks for reply me. >> >> > >> >> > On Tue, Jan 10, 2012 at 6:15 PM, Swindells, Thomas >> >> > <TSwindells(a)nds.com&gt; >> >> > wrote: >> >> >> >> >> >> Looking at the stack trace, if you are on the same version as drools >> >> >> as >> >> >> me >> >> >> it looks like it is this line >> >> >> this.rule.setDialect( getDialect().getId() ); >> >> >> >> >> >> The most likely reason is your DRL isn't valid - perhaps where you >> >> >> are >> >> >> specifying the dialect, or it could be your >> >> >> Dependencies aren't right or something. >> >> >> Which version of drools are you using. Have you tried reducing your >> >> >> DRL >> >> >> file to the minimum that generates the error - then post that DRL if >> >> >> you >> >> >> need further help. >> >> >> >> >> >> Thomas >> >> >> >> >> >> > -----Original Message----- >> >> >> > From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users- >> >> >> > bounces(a)lists.jboss.org] On Behalf Of jjmartinez >> >> >> > Sent: 10 January 2012 17:05 >> >> >> > To: rules-users(a)lists.jboss.org >> >> >> > Subject: Re: [rules-users] NullPointerException when load file >> >> >> > rules >> >> >> > >> >> >> > Anybody can help me? I don't know why my application show these >> >> >> > errors. >> >> >> > >> >> >> > Thanks in advance! >> >> >> > >> >> >> > java.lang.NullPointerException >> >> >> at >> >> >> >> >> >> >> >> >> org.drools.rule.builder.RuleBuildContext.<init>(RuleBuildContext.java:88) >> >> >> at >> >> >> org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:1149) >> >> >> at >> >> >> >> >> >> org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:636) >> >> >> at >> >> >> >> >> >> >> >> >> org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:266) >> >> >> at >> >> >> >> >> >> >> >> >> org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:458) >> >> >> at >> >> >> >> >> >> >> >> >> org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28) >> >> >> at >> >> >> drools.ejemplos.DroolsTest.readKnowledgeBase(DroolsTest.java:85) >> >> >> at drools.ejemplos.DroolsTest.execute(DroolsTest.java:64) >> >> >> at drools.ejemplos.DroolsTest.<init>(DroolsTest.java:56) >> >> >> at drools.ejemplos.Activator.start(Activator.java:14) >> >> >> at >> >> >> org.knopflerfish.framework.BundleImpl.start0(BundleImpl.java:356) >> >> >> at >> >> >> org.knopflerfish.framework.BundleThread.run(BundleThread.java:107) >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> ************************************************************************************** >> >> >> This message is confidential and intended only for the addressee. 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